docs: def delete_contacts(self, uid, **kwargs):
          """
          Unassign contacts from the specified list.
          If contacts assign only to the specified list, then delete permanently.
          Returns True if success.
  
          :Example:
  
          client.lists.delete_contacts(uid=1901010, contacts="1723812,1239912")
  
          :param int uid:      The unique id of the List. Required.
          :param str contacts: Contact ID(s), separated by comma. Required.
          """
          uri = "%s/%s/contacts" % (self.uri, uid)
          response, instance = self.request("DELETE", uri, data=kwargs)
          return response.status == 204